Light-rays refractor.



E. G. J'OHANSON.

LIGHT RAYS REFRACTOR. APPLICATION FILED JUNE 24, mm.

7 I Patented Nov. 7, 1916.

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To all whom it may concern: 1 Be it known that I, EMIL G. Jonanson,

e a subject ofthe King of Sweden, residing at Chicago, in the county of Cook and State of Illinois, have invented new and-useful Improvements in Light-Rays Refractors, of.

which the following is a specification.

This invention has-for its object to provide' a novel and improved translucent glass structure designed more particularly for use in connection with motor vehicle headlights, and embodying a; structure whereby the; light rays are diffused, and their direct 'pas-' sage through the glass is reduced to a inini-- mum, so that the intenseg'l'are is entirely eliminated.

In the accompanying drawing, Figure 1 is a plan view showing one embodiment of the invention, and Fig. 2 is a cross section on the line 22 of F1g.' 1:

Referring specifically to the drawing, the

glass here shown is circular and conc'avoconvex, and both sides'thereof are formed with series of protuberant lenses 5, the same being arranged in concentric circles, and

.those of one circle bein situated in alternation with those of t e next inner and outer circles. On account of the concentric design, the lenses increase'insize radially. The lenses onthe concave or rear side of the glass are arranged in the same'manner as the lenses on the convex or front side of the glass, but they are also arranged staggered with respect to the latter, this staggered arrangement being followed with respect to the circles and on radial lines, as will appear from an inspection of Fig. 1, inwhich the lenses of the convex side of the'glass' are shown dotted.

The purpose of the staggered arrangement of the two sets of lenses is to cover Spwifiatibn r new hunt. I Patented Nov. *7, 1916. Application filed une 24, 1916. fie rial 10. 165,672. v

lenses on the convex side of the glass by the use of the same design. Furthermore, regulari of design is preserved for the reason that t e circles of. lenses on the concaveside fall between the circles of lenses on the convex side, and this also assists in rendering the radial enlargement of the lenses gradual, resulting in a uniform diffusion of light. In the center of the glass'is a lens 6 commonly used for breaking up the central of a series of triangular prisms having one face coincident with the basal surface and arranged in a circle to have their a ices meet at one .point, or at the center 0 the hbasal, surface.

I clann:

1. A light rays reiractor comprising aas asv possible the spaces between the glare of the headlight, and being composed 5s glass unit formed with protuberant lenses 3 on both sides, said lenses being arranged concentric circles, the circles and the lenses of the respective circles on one side being staggeredkwith respect to the circles and the lenses of the respective circles on the other side, and the lenses in the circles on both sides of the unit increasing in size outward from the center of the unit.

2. A light rays refractorcomprising a, concavo-convcx'glass unit formed with pro tuberant lenses on both sides, said lenses being arranged in concentric circles, the circles and the'lenses of the respective circles on one side being staggeredjwith respect to the circles and the lenses of the respective circles on the-other side, the lenses in the circles on both sides of the unit increasing in size outward from the center of the unit.

In testimony whereof I afiix my signature.

= EMIL e. JOHANSON. 

